From owner-freebsd-questions  Fri Feb  1 14:15:37 2002
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Date: Fri, 1 Feb 2002 14:15:29 -0800 (PST)
From: Zachary Giardalas <esekla@yahoo.com>
Subject: Re: cdrdao cannot allocate memory error
To: Fernan Aguero <fernan@iib.unsam.edu.ar>,
	FreeBSD Questions <freebsd-questions@freebsd.org>
Cc: cdwrite@other.debian.org
In-Reply-To: <20020201164017.A5156@iib.unsam.edu.ar>
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I may be way off-base on this but, at least on Linux,
I think I recall that allocating shared memory
required root priveledges.  Try logging in as root and
running it, just as a test.

--- Fernan Aguero <fernan@iib.unsam.edu.ar> wrote:
> [please CC me since I'm not subscribed to the list]
> [Note: cross-posting to cdwrite and
> freebsd-questions lists]
> 
> Hi all,
> 
> I am using cdrdao to read and write CDs from/to my
> SCSI CD-R.
> 
> As suggested in pkg-descr and pkg-message (FreeBSD
> ports system) I
> have set the following in my kernel configuration
> file:
> 
> options 	SYSVSHM			#SYSV-style shared memory
> options 	SYSVMSG			#SYSV-style message queues
> options 	SYSVSEM			#SYSV-style semaphores
> 
> 
> options 	P1003_1B		#Posix P1003_1B real-time
> extensions
> options 	_KPOSIX_PRIORITY_SCHEDULING
> options   _KPOSIX_VERSION=199309L
> 
> However, I always see errors like the following:
> ERROR: Cannot create shared memory segment: Cannot
> allocate memory
> ERROR: Try to reduce the buffer count (option
> --buffers).
> 
> According to cdrdao(1), the default number of
> buffers for FreeBSD is
> 20 (1 buffer == 1 second of audio data). 
> Sometimes I can get cdrdao to work with --buffers
> 16, but now I'm also
> getting errors with this number of buffers.
> If I go lower (say --buffers 10, which is the
> minimum) I get buffer
> underruns.
> 
> Single-user machine
> Pentium III 600 MHz, 768 MB RAM
> FreeBSD-4.3 (RELENG_4_3)
> I have X running but no KDE or Gnome ... just plain
> icewm.
> Errors occur even with low system usage (just X and
> one or two
> Eterms).
> 
> Questions:
> i) why is cdrdao not able to get the memory it
> needs? There
> 	 should be plenty of it most of the time.
> ii) Is there anything I can do to fix this?
> 	  Change my kernel config and recompile?
> 		Play with sysctl?
> 		
> Thanks in advance for any help,
> 
> Fernan
> 		
> PS: I'm using cdrdao basically because it's the only
> way to get
> cdparanoia-style ripping in FreeBSD. All other
> rippers are not just
> paranoid enough (even with discs that appear OK
> there are problems).
> 
> PS2: cdparanoia builds on FreeBSD but is not able to
> open the CD-ROM
> (ATAPI in my case) or the CD-R (SCSI) for reading. 
> 
> 
> -- 
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> 


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